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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Clavin; Edward A.
Address:
Houston, TX
No. of patents:
13
Patents:












Patent Number Title Of Patent Date Issued
4306134 Arc welding pipe apparatus December 15, 1981
Pipe welding clamp apparatus, including a pair of clamp assemblies, one being of conventional design and the other being of a special design permitting access to the axial space between the clamp assemblies so that internal welding assemblies may be disposed partly within said axial spac
4293758 Welding apparatus including means for depositing the weld metal along parallel paths October 6, 1981
Improved methods and apparatus for welding, wherein during welding the welding electrode is oscillated laterally of the weld path, and the welding current pulse frequency and oscillation frequency are correlated whereby weld metal droplets are deposited when the electrode is at its l
4286138 Welding methods and apparatus including alternate weld metal depositions along opposite sides of August 25, 1981
Welding methods and apparatus, wherein a welding electrode is oscillated by a motor-driven oscillator in back and forth movements transverse to a weld joint, and an alternating welding current is supplied to the welding electrode in timed relation with the welding tip oscillations so tha
4285460 Method and apparatus for double jointing pipe August 25, 1981
Method and apparatus for double jointing pipe, wherein a first pipe section is moved onto a pipe support roller assembly and moved lengthwise over a boom which carries a pipe clamp and internal welder at its end. A second section of pipe is then moved onto the pipe support roller assembl
4260869 Traveling welding carriage April 7, 1981
Traveling carriage apparatus, adapted to travel along a track disposed about or upon an object, to carry a device such as a welding torch to do work upon the object or upon other apparatus supported thereby. The apparatus is hinged end-to-end, preferably having three hinged-together
4250813 Track apparatus February 17, 1981
Track apparatus, consisting of a circular track adapted to be affixed end-to-end around a pipe, usually adjacent an end thereof, to support a carriage apparatus for travel about the pipe, welding equipment, or the like, being mounted on the carriage apparatus for use in welding the pipe
4177914 Rotary internal pipe clamp apparatus December 11, 1979
Rotary internal pipe clamp apparatus for use in welding pipes together end to end, said apparatus having a first set of circularly spaced pipe engagement elements for disposition within the end of one section of pipe, and having a second set of circularly spaced pipe engagement elements
4164135 Rotary internal pipe bending mandrel August 14, 1979
Rotary internal pipe bending mandrel, wherein sets of pipe engagement elements at opposite sides of the pipe interior are actuated by generally radially disposed toggle elements which expand and retract the pipe engagement elements by rotations of a central assembly. The elements which
4132104 Method and apparatus for bending coated pipe including heating the pipe coating by resistance he January 2, 1979
Method and apparatus for bending coated pipe including heating a specific area of the pipe coating by resistance heating to prevent damage at all areas of the pipe coating during bending of the pipe. The pipe bending equipment includes an upper bending die, and a lower pin up shoe and a
4126065 Pipe end finishing apparatus November 21, 1978
Apparatus for finishing the ends of pipes, particularly for shaping the ends of pipes preparatory to welding the pipes together end-to-end, wherein the cutting tool or tools employed to finish the pipe end are urged against the pipe end hydraulically, and wherein the hydraulic fluid
4092928 Traveling support apparatus June 6, 1978
Traveling support apparatus for supporting welding device or other apparatus for peripheral travel about a pipe. The support apparatus utilizes endless belts disposed around paired wheels at opposite sides of the apparatus to propel the apparatus along a track. The endless belts are
4088007 Pipe bending mandrel May 9, 1978
Pipe bending mandrel wherein oppositely disposed pipe wall engaging elements are connected to a drive unit at one end by toggle elements permitting inward and outward movements of the pipe wall engaging elements, and wherein said pipe wall engaging elements are connected to a longitu
4027522 Internal mandrel for use in bending the ends of pipes June 7, 1977
Internal mandrel for use in bending the ends of pipes, wherein a hydraulic cylinder actuates a system of levers and toggles to apply force across the interior of an end of a pipe in the direction in which the pipe is to be bent to prevent distortion and collapse of the pipe during bendin










 
 
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